Stretching Image to Fit Partition

Hello,

If I have a workstation image that was created on a machine that has a 60
GB partition image and I get a new workstation that is the same except it
has a 160 GB drive in it. How do I stretch the 60 GB image so that the
partition takes up 160 GB?

Did I create the image incorrectly?

I'm using a PXE boot and doing a Maintenance Mode manual image.

Thanks,

Warren